CVE-2011-3227: Apple Mac OS X

Medium severity, CVSS 6.8. EPSS: 1.8% chance of exploitation in the next 30 days.

libsecurity in Apple Mac OS X before 10.7.2 does not properly handle errors during processing of a nonstandard extension in a Certificate Revocation list (CRL), which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) a crafted (1) web site or (2) e-mail message.

Affected products

• Apple Mac OS X: up to and including 10.7.1; version 10.0 only; version 10.0.0 only; version 10.0.1 only; version 10.0.2 only; version 10.0.3 only; …
• Apple Mac OS X Server: up to and including 10.7.1; version 10.0 only; version 10.0.0 only; version 10.0.1 only; version 10.0.2 only; version 10.0.3 only; …

Published 2011-10-14. Last modified 2026-06-16.